Biodegradable agricultural plastic mulching film with insect damage preventing effect

Abstract

The invention discloses a biodegradable agricultural plastic mulching film with the insect damage preventing effect. The biodegradable agricultural plastic mulching film is prepared from, by weight, 64-70 parts of dry-basis corn starch, 23-26 parts of ethyl alcohol, 11-15 parts of monochloro acetic acid, 14-16 parts of silicon dioxide, 0.08-0.1 part of epoxy chloropropane, 60-80 parts of dimethylformamide, 3-4 parts of aluminium stearate, 2-3 parts of carboxymethylcellulose, 2-3 parts of borax, 1-2 parts of tannic acid, 3-4 parts of mannitol, 3-4 parts of paraffinic oil, 6-8 parts of sophocarpidine, a proper amount of ethanol solution of 85% and a proper amount of deionized water. The biodegradable agricultural plastic mulching film is simple in material formula and low in raw material cost, and under the conditions that the cost is saved, and labor force is reduced, the crop growth promoting effect is achieved, insect damage is prevented, production increasing is promoted, full degradation is nontoxic and harmless for soil, and the biodegradable agricultural plastic mulching film is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of agricultural mulching films, in particular to a biodegradable agricultural mulching film with the function of preventing insect pests. Background technique [0002] At present, plastic film mulching technology has been widely promoted in agriculture, and has been applied to the planting of wheat, rice, corn, soybean, sorghum, cotton and other crops, and the effect of increasing production is obvious. It is neither corroded by microorganisms nor decomposed by itself. If things go on like this, it will inevitably bring pollution hazards that are difficult to solve for future generations. Therefore, research on degradable mulch has gradually attracted attention. Starch is an abundant renewable resource in nature. It is non-toxic, harmless, and completely biodegradable. However, its poor mechanical properties and waterproof properties limit its application. Its application is limited. Starch is a renewabl...

AI Technical Summary

Problems solved by technology

[0003] In the article "Study on Hydrophobic Modified Starch / PVA Biodegradable Plastic Mulch Film", the author used corn starch as raw material, which was double-modified by carboxymethyl etherification and cross-linking. The molar ratio of starch is 1.85, the etherification time is 2.33h, and the concentration of ethanol is 84.65%. The dosage is 1.5%, and then get cross-linked carboxymethyl starch with strong thermoplasticity, and then use it to blend with PVA. After cross-linking, speed-up, and hydrophobic modification, the mechanical properties of the film meet the standard requirements, and the water absorption rate is greatly improved. However, its comprehensive performance is still not up to the needs of actual use, and it needs to be further modified to meet various use requirements, so as to improve the mechanical properties, toughness, strength and other properties of starch films, and expand the scope of application.